The vrishorsargam karma -:
Either in full moon at karthika month or in any other good day, or uthrayana
time at sukla paksha or even at Krishna paksha or during ekadasi with a
pure heart in a exalted holy place on a good tidhi day, on a good yoga
nakshtra time, in a good manner, inviting Brahmins who are learned in ved
and Kula after invoking Gods, making oneself pure, after doing puja of
Navagraha and doing archana of mother devata, offering puranahadhi doing
shardha in name of maha Vishnu, a rishiba calf has to be bathed with water
sanctified by mantras. Then decorating it with cloth, ornaments and sweet
smelling flowers, further joining it with four more male calves make the
rishbha calf to go around the fire, then facing the north direction looking at
the rishbha calf one has to tell ` Oh! Dharma, you only become rishiba, you
only was created first by Brahman thus telling if the calf is given in charity
in name of dead person or if the person does it for himself, thinking for
oneself the water sanctified by mantras is poured on the tail and the water is
to be collected in the hand and sprinkled on the head and the rishiba calf
should be left free along with other male calves.